Hi Morita and other developers, If i add a QEMU/Libvirt driver(the same as Sheepdog volumes driver in Openstack Cinder branch) to let Openstack Cinder support a new block-level storage system, I should change following stuffs, right? 1, Add a driver file to the dir in Openstack Cinder branch(the same as sheepdog.py), https://github.com/openstack/cinder/blob/master/cinder/volume/drivers 2, Change the file in Openstack Nova branch(Let libvirt attach HLFS volumes to QEMU, the same as sheepdog), https://github.com/openstack/nova/blob/master/nova/virt/libvirt/driver.py Do I should change/add any other files for Openstack? Cloud anyone give me some suggestions? Thanks in advance ;-) -- Thanks Harry Wei